COPPER AND COPPER ALLOYS

INTRODUCTION

Copper and its alloys are extensively used in a wide range of products that play a vital role in our everyday lives. They offer excellent electrical and thermal conductivity, good strength and formability, outstanding resistance to corrosion and fatigue, and are generally nonmagnetic. These metals can be easily soldered and brazed, and many are weldable using various gas, arc, and resistance welding methods. Additionally, copper and its alloys can be polished and buffed to achieve nearly any desired texture and luster.

Pure copper is widely used for electrical wiring, cables, electrical contacts, and other components requiring efficient conduction of electricity. Copper, along with certain brasses, bronzes, and copper-nickel alloys, finds extensive application in automotive radiators, heat exchangers, home heating systems, solar collectors, and other devices requiring rapid heat conduction across metal sections.

Due to their exceptional corrosion resistance, copper, brasses, bronzes, and copper-nickels are commonly used for pipes, valves, and fittings in systems carrying potable water, process water, industrial gases, and other aqueous fluids.

Furthermore, copper alloys are uniquely suited for environments where minimizing bacterial contamination on frequently touched surfaces is critical. With the ability to kill 99.9% of bacteria within two hours, over 280 copper alloys have been granted public health registration by the U.S. Environmental Protection Agency (EPA). This recognition highlights copper’s ongoing antimicrobial properties, which help reduce infection-causing bacteria on surfaces in hospitals, schools, offices, and other public spaces between regular cleanings.

General and Atomic Properties of Copper

Atomic Number29
Atomic Weight63.546
Atomic Diameter2.551 x 10 -10m
Melting Point1356 K
Boiling Point2868 K
Density at 293 K8.94 x 10 3 kg/m 3
Electronic Structure3d 104s
Valence States2,1
Fermi Energy7.0 eV
Fermi Surfacespherical, necks at [111]
Hall Coefficient-5.12 x 10 -11 m 3/(A .S)
Magnetic Statediamagnetic
Heat of Fusion134 J/g
Heat of Vaporization3630 J/g
Heat of Sublimation @ 1299 K3730 J/g

Crystallographic Features of Copper

Type of Structure

A1

Space Group

h 5 – Fm3m

Crystal Structure

face-centered cubic

Number of Atoms per Unit Cell

4

Lattice Parameters at 293 K

3.6147 x 10 -10 m

Distance of Closest Atomic Approach
(Burgers vector) at 293

2.556 x 10 -10m

Goldschmidt Atomic Radii
(12-fold coordination)

1.28 x 10 -10m

Atomic Volume

1.182 10 -293

Source: “Properties of Copper and Copper Alloys at Cryogenic Temperatures” by N.J. Simon, E.S. Drexler, and R.P. Reed ( NIST MN 177)

PRODUCTS

Our products are manufactured using world-class raw materials, sourced from some of the most prominent copper mines around the globe. We use virgin copper cathodes and the most advanced, state-of-the-art machinery to ensure exceptional quality. As a result, we are confident that our products maintain the highest levels of purity and quality in the industry.

We specialize in high-quality copper strips and bus bars, which are widely used across various industries due to their outstanding properties—including excellent electrical and thermal conductivity, superior mechanical strength, and exceptional malleability and formability. These copper products can be easily fabricated, welded, or soldered to meet diverse application needs.

Our copper strips and plates are available in a variety of widths and thicknesses, tailored to customer requirements. Utilizing continuous strip-casting machines, we produce long, weld-free coils with uniform composition and properties. Additionally, automatic electronic gauge controls ensure consistent thickness and dimensional accuracy throughout production.

GRADES
1. Oxygen free high conductivity copper.
2. Supplied in hard/ halfhard / quarter hard / annealed conditions.